Revoking mechanism for weft replenishing looms



Oct. 29, 1940. Q DARWIN 2,219,767

Y anvoxng nEcaAm'sM Fon wEFT REPLENISHING Looms l Filed Aug. 4, 1939 F15- I FIG- i' lNveN-roa Curl-'cao .DARwm ATToBNEY Patented Oct. 29, 1940 y PATENT OFFICE REvoKINGMEcHANTsM Fon WEFT REPLENISHING LooMs Cliord Darwin, Worcester, Mass., assignor to Crompton & Knowles Loom Works, Worcester, Mass., a corporation of Massachusetts Application August L1, 1939, serial No. 288,412

A claims. (ci. 139-231) This invention relates to improvements in revoking mechanism for Vweft replenishing looms and it is the general object of the invention to provide mechanism by which revoking can be ac-k 5 complished by a positive motion derived from Va misplaced shuttle. Y

Weft replenishing mechanisms generally employ a transfer arm to which is pivoted alatch normally out of the path of a bunter on the reciprocating lay. Y When a transfer is called by weft exhaustion the latch is moved into the path of the bunter and as the lay moves'forwardly a force transmitted through the latch depresses the transfer arm to insert a fresh bobbin into the depietea shuttle. If the shuttle should be misplaced as the result of a weak pick or rebounding it would not be in proper position lto receive the fresh bobbin and a mechanism including a shuttle feeler acts' to lower the" support for the latch. Y

By such an arrangement the latch falls by gravity away from the pathof the bunter, but in high speed looms the timeallowed to the latch to 'fall to bunter clearing position is so short that a transfer is not always revoked and a broken bobbin or shuttle may result. It is an important object of my present invention to provide a positive connection between the shuttle feeler and the latch operativeduring the rst part at least engages the under side of the latch. As shownin that patent revocation of a transfer effects 4.0 lowering of the lifter but gravity is relied upon to depress the latch below the path of the bunter.

It is a further object of my present invention to form the latch and lifter as shown in that patent with cooperating parts which become interrelated during the lifting of the latch Lto establish a temporary positive connection between the latch andthe shuttle feeler.

tle is communicated positively to the latch. I prefer to make the interengaging parts separate during the latter part of the revokingmotion,

but this separation does not occur until the latch is below the path of the bunter. v As a matter of convenience I make one ofl the interengaging By reason of this posi. tive connection the first part of-any motion ofA the shuttle feeler derived from a misplaced shut` vention to placel the cooperating parts, one on 10 the lifter and one on the latch, in such positions that their arcuate paths intersect toeffect mutual engagement during upward motion of the latch.

Although the lifter as set forth hereinafter movesY in an arcuate path I do not deem this an essential 15 relationship, since it is sufficient that `the two co-acting parts move in intersecting paths.

With these and other objects in view which will appear as the description'proceeds, my invention resides in the combination and arrange- 20 ment of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of lmy invention is set forth,

Fig. 1 is a side elevation of aA loom having a weft replenishing mechanism equipped with my 25 improved revoker, parts being in section and the transferrer latch being shown in down vor nontransferring position, y

Fig. 2 is a view similar to Fig. 1 but with the latch raised to transfer position and with the 30 positive connection established between the latch and the shuttle feeler,

`vFig. 3 is a detailed rear elevation on an enlarged scale in the direction of arrow 3, Fig. 2,V

and 35 f FigsA, 5 and 6 are diagrammatic views showing the manner in which the positive vconnection between the latch and shuttle feeler is established.

,Referring to the drawing, I have shown a loom frame I0 having a layvll mounted on lay 40 swords I2 drivenbypa connector i3 attached to the usual top or crank shaft knot' shown by means ofl which the lay is moved backwardly and forwardly, .orto theright and left as viewed in Fig. 1.

In Fig. 1.the lay is shown in its forward or front 45 center position where transfer takes place. The laylis'supported by and swings around rocker pins |5in the usual manner.

A shuttle box I6 receives the shuttle S and a transfer bunter I1 extends forwardly from the 50v connected pivotally to a latch carrier 2l as at 22. ISIS?.Y

The transfer arm I9 is normally up as is well understood in bobbin changing mechanisms but can be depressed by engagement of the bunter I and latch I8 during forward motion of the lay.

The magazine M as shown herein provides two distinctive types of reserve bobbins indicated at W and W', respectively, and rocks about a iixed pivot 23 to place .onefor the other of' the reserve bobbins under the transfer arm |91 It is not believed necessary to give a description of the mechanism by which the magazine is rocked and; reference may be had to the aforesaid f Turnerv patent for further details of the magazine andthemeans by which it is rocked. I have also omitted the selector mechanism by whichY thefangular position of the magazine' is determined; As

shown in Fig. l, however, I have shown the for- I Ward or left end of a normally stationary: armn32.

which rises preparatory .to a transfer from the position shown in Fig. l to that shownin Fig. 2.

It is deemed unnecessary to show and. describe f the means by which this arm is raised, since the mechanism is that shown in the aforesaidTurner patent and also used vextensively in multicolor shuttle changing looms.

A stand held to the loomside by a bolt 6| may have its angular position varied by means of 'two adjusting screws 62 which when set cooperate with the bolt to hold the stand in rigid adjusted positio-n.v The bracket carries stud 63 on which is mounted a carrier lever 04 having a horn 65 on which is secured the shuttle feeler 66. The latter may be formed 'as a rod with an enlarged head 61 for direct engagement with the shuttle should the 35 latter be misplaced during forward motion of the lay. f

Depending from lever 64^is an arm 68 which is pivotally connected as at 69 to a rod head |0 adjustable on the upper end of a setting rod The lower end of this rod is adjustably connected' to another rod head |2 from which depends a finger '|3. This finger has a notch '|4 in the lower end thereof above which isa ilattened areaf 'I5 leading to a recessed inclined part 16. The bottom of finger 'I3 isl connected'by a light Atension spring to the lower end of a second finger 'I8 pivoted at its upperend vas at- 19 to the rod head '|2. The two fingers are movable away from each other against the. action` of` spring` and.` are 'normally urged tomove toward each other to have engagement with a stud oniarm32. Stud 80 is normally located in the pocketl` out of whichit canmove during the latter part ofthe upward motion of arm 32. I

lifter or setter 'adjustable vertically in the arm bya checknutA 86. held in fiXed position -as shownin Fig. 1 limits upward motion oflatch I8.v Arm 64 hasazsmall finger movable between and limited by front;

and backadjustable stop screws 9| and 92, respectively, carried inthe stand 60.

, In the operation of parts thus far described-thal lay normally reciprocates, causing the bunterfIl to traverse a path above the latch I8, andthe latter together withtheY shuttle feeler will. be in.

non-transferringposition, that zis,V latch I 8 willbe down and shuttle feeler 66.will be forward,r `their positions determinedby engagement of. finger 90 with stop screw 92 as shown `in Fig. 1. Thearm 32- will '.be V-normally at Vrest and the. stud. 80willbe. in thexpocket '|4. When transferis tooccur arm. 32.will risetoliftrod Il and therefore rock arm' 64`in .a.clockwise direction.. .This has. thegeffectof moving the .shuttle .feelers 66. rearwardly or: to.

Extending upwardly from the arm 68 is a latch.r

An adjustable stop screw 8`| the right from the position of Fig. 1 to that of Fig. 2, and also causing rising of the lifter 85 against the under surface of the latch I8 to lift the latter to the position of Fig. 2 in the path of bunter II. When the parts are set for transfer as just described and as shown in Fig. 2, a finger 90 will engage stop screw 9|, but arm ,32 will continue to rise, thereby causing stud 80 tomove out of the pocket-'M and assume a position along the flattened area 15 as shown in Fig. 2. 'Ihese motions attending the rising of arm 32 occur while the lay is. in rear position and when completed set the V"wardly andact through horn 65 to rock arm 64 in acounter-clockwise direction and thereby lower the lifter IRS-against the relatively light resistance offered bythe spring which holds substantially parallel surfaces against the temporarily stationary stud 80. A resetting pin 93 for returning the arm 64 to normal position may be as shown in the Turner-patent but will be described in more detail hereinafter.

The parts thus far described of themselves form no partof my present invention-except as pointed out in the following description, and for a further description reference may be had to the patent already mentioned. v

In carrying my invention into effect I provide the lifter with a forwardly extending finger |00 and also mount a plate I0 I 'on the latch. This plate has a slot. |02 .through which extends a screw ||l3 tapped into the latch. The plate |0| may there.- fore be given any one of a plurality of adjusted positions with respect to the latch. 'Ihe lower part ofthe plate is bent horizontally to provide a shelf |05, see Fig. 3 which is spaced below the lower surfaceV |06 of the latch |8. The latter therefore defines with the shelf a pocket propor` tioned to receive the finger |00.

During-` the. lifting of arm Glas already described the :finger |00. will swing around the stud.

|33 and, engage. the. under side of the latch I 8. Continued upwardmotion of the finger |00.will rock the latch around the transfer arm. carried pivot 22. Because of the'locationof. the pivots around which the finger |00 and' the. shelf |05.

turn,.th`ese parts traverse intersectingl paths.

`As showngdiagrammatically in Fig. 4 the finger |00 hast just engaged surface A|0Ii.of the latchbut are setsfor transfer, asshownin'Fig. 6, will move the shelf. |05Ifarther under the nger |00. By reasonfbfl thefaoljustmentv of theplate I0.|..the

shelf. |05.can be caused .to move under the finger` |00. before theelatch reaches the'path of the bunter |j`|,1,and theresultI of this adjustment@ is `:to

require; the shelf to` remain under` the finger:

whenever the latch: is.` in positionwhereit can engageth'e bunter.

Having. in mindfthe previously described operation of. revocation, it; will be seen that during a.

normal. transfer the --latch willbe able to move scentof` the transfer arminanormal transfer.

Should the shuttle be misplaced, however, arocking of arm 64 in a counter-clockwise directionas: viewed in the drawing will move the finger down by a positive force derived from the shuttle and transmitted through the shuttle' feeler. During this downward motion the finger will engage the shelf and exert a positive downward force on the latch which effectively moves the latter out of the path of thebunter.

64 the nger |00 and the shelf will become disengaged, but this does not occur until. after the latch has been moved positively to a position out of the path of the bunter.

It is necessary to make provision for returning the arm 64 and shuttle feeler 66 to the normal position shown in Fig. 1 when a normal transfer occurs. This is done by means o f a resetting pin 93 projecting forwardly from the lay for engagetransmitting relationship with respect to each' other before the resetting of arm 64 begins and as a result the latch I8 does not interfere with -the return of the shuttle feeler to normalposition.

The complete restoration of normalconnections between the shuttle feeler and the lever 3.2 may be substantially the same as set forth in -the' aforesaid Turner patent and it is not thought necessary here to give any detailed description of the relationship of the'v stud 80 and the partsv connected to the bottom of rod 'H other than to say that descent of lever 32 spreads the parts 13 and 18 because of the engagement of finger 90 with the stop screw 92,thereby permitting stud 80 to return to the notch 1d, after which the mechanism is completely reset and ready for another replenishing operation.

From the foregoing it will be seen that I have provided a very simple means for lowering the latch when a transfer is revoked by a force derived from the misplaced shuttle and transmitted positively through the finger |00 and the shelf |05. It will also be seen that the positive transmission of force does not interfere with the forward motion of the latch during a normal transfer. In this connection I may say that in a normal transfer the shuttle feeler will be moved from its detecting back to its normal forward position before the latch becomes disengaged from the bunter, but this operation can occur because of the fact that the shelf |05 will move forwardly from a position under linger |00 during the rst part of a normal transfer and arm 64 may therefore fall to its normal position without interfering with shelf |05. During the subsequent release of the latch by the bunter as the lay re- A'cedes the shelf |05 can fall freely with the latch without interference on the part of the finger |00 since the latter has already reached that part of its path which does not intersect the arcuate path of the shelf. The parts can therefore resume a position preparatory to another transfer upon the completion of a normal transfer.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and, scope of the invention During the latter part of the revoking movement by the arm andI .do not wishto be vlimited to the detailsV herein disclosed, but what VI claim is:

`1. Inia weft replenishing loom having a transferrer arm and a lay with a bunter to actuate the transferrer arm, a latch' pivoted to the transferrer arm and normally out of the path of the bunter, setting mechanismto move the latch angularly into the path of the bunter, a pivotal support for the setting mechanism, a shuttle feeler secured to the setting mechanism and movable by the latter to` shuttle detecting position when the latch moves to transfer position, and two normally disconnected parts one of which moves along a given arcuate path with the setting mechanism andthe other of which moves along a curved path with the latch, said parts moving along paths which intersect as the setting mechanism'moves the latch to -transfer position, said parts thereupon having force transmitting relationship with respect to each other, the shuttle feeler when engaged by a misplaced shuttle moving the setting mechanism and causing a force to be transmitted through said parts to move the latch away from the path of the bunter.

2. In a weft r'eplenishing loom having a transferrer arm Aand a lay with a bunter to actuate the transferrer arm, a latch pivoted to the transferrer arm and normally out Iof the path of the bunter and movable in an arcuate path from normal to transfer position setting mechanism normally in non-transferring'position, a pivotal support for the setting mechanism', means to move the setting mechanism to transferv position along an arcuate path around'said pivotal sup port preparatory'to a weft replenishing operation, said ysetting mechanism when moving to transfer position engaging the latch and moving vthe latter angularly into the path of the bi'inter;V atshuttle feeler moving with the setting mechanism and moved by the latter to shuttle detecting position when the settingy mechanism moves Ito transfer position, and means secured to the latch movable in a curved path with said latch toward transfer position, the paths of the setting mechanism .and said means being separated when the setting means and latch `are in normal position, and the paths of the setting mechanism and said means approaching each other and overlapping as the latch moves toward transfer position to establish force transmitting relationship between the setting mech- -anism and said means, the shuttle feeler when moved by a misplaced shuttle causing the setting mechanism to move from transfer toward normal position and cause the latch to move from transfer toward normal position by a force transmitted positively through said means, the setting mechanism and said means when returning to normal position lying along parts of their paths which are separated.

3. In a weft replenishing loom having a transferrer arm and -a lay with a bunter to actuate the transferrer arm, a latch pivoted to the transferrer arm and movable relatively to the latter in a curved path and normally out of the path of the bunter, setting mechanism normally disconnected from the latch and movable in a given arcuate path toward said curved path of the latch to engage4 and place the latter into the path of the bunter, a shuttle feeler connected to the setting mechanism to be moved to shuttle detecting position when the latch is moved into the path ofthe bunter by the setting mecha- 40X ship between the setting mechanism and. said.v means at a given timein the loom cycle, and` connected from". tliei setting mechanism. to. be' moved*y angularly by the' latch. toward* said given arcuate path of l they settinglmechanism into' force transmitting relationship with respect tothe setting mechanism during'movement of' the latch v tov/ard the'patli of the-bunter, theabunter moving the latch to move said meansV and' break said force transmitting relationship at a'- given timev in a normal transferring operation; and means to initiate return of` the setting mechanism to normal position after the -force transmitting relationship Vhas been interrupted during anormal transfer; movement of theV shuttle feeler by a misplaced shuttle when transfer'is revoked causingthey setting mechanism to move the latch away from the' path. of the bunter.` by

a force transmitted'. through the first' named' means prior' to said'time.

4. In a weft replenishingloom having a trans.-

errer arm and a lay with a bunter to. actuate..

'moved thereby to shuttle detectingposition when.k

the latch moves toward the pathof the bunter, meansnormally out of said` given arcuatepath of the setting mechanism moyalole` into. said given arcuate path4 by angular motion of the latchto.- Ward the bunter path to.. establish forcev transmittingrelationship between the setting, mechanism andthe latch, .motion of the` latch by the. bunter during a normal transfer moving said,

means to breakA the force transmittingn relationnism; ,means carried by-v the.'` latchl normally: dis-f other#meansactingsubsequent to the breaking of; said, force" transmitting relationship during the=normal transfer. to initiate movement of the settingmechanismaway from transfer position, thezshuttle-feelerwhen'moved by a misplaced shuttle revoking the transfer and causing the setting mechanism t'o move the latch away from the path-of the bunter by a force transmitted through the first named meansbefore said given time.l

5. In af-weftreplenishing loom having a transferrerarm and a reciprocating lay with a bunter to actuate the transferrer arm, a latch pivoted to the transferrer arm andI normally out of the path of thebunter, setting mechanism normally disconnected from the latch, a pivotal support for the setting mechanism spaced from the axis of the'latch, saidsetting mechanism being movable, angularly to engage and move said latch pivotally into the path of the bunter preparatory to a transfer operation, a shuttle feeler secured to the setting, mechanism and movable by the latter. to shuttle, detecting position when the latch is moved. intofthe path of the bunter by said'lsetting.. mechanism two normally disconnected partsone. of. which moves angularly with the. settingmechanism and the other of which moves angularlygwith the latch, said parts moving angularlyv into force transmitting relation by motion of the latch caused by the setting mechanism, engagement of the latch by the bunter durngja normal transferseparatmg said parts to J break the force transmitting relationship at aagiventime inthe loom cycle, movement of the shuttle feeler by a misplaced shuttle causing the latchto.move.out of the path of the bunter and therebyyrevoke transfer. by -a force. transmitted throughsaidi parts@ prior tothe given time.

CLIFFORD DARWIN. 

